|Dates|| ???? - 2017 (killed by Castiel)|
2017 (becomes the new incarnation of Death)
|Location|| Death's Reading Room|
|Episode(s)|| 11.02 Form and Void|
11.10 The Devil in the Details
11.17 Red Meat
11.23 Alpha and Omega
12.06 Celebrating the Life of Asa Fox
12.09 First Blood
13.05 Advanced Thanatology
It's funny to hear a Winchester talk about the finality of dying. This reality, it has rules, Dean. So many rules. And one of them: kill one incarnation of Death, like you did. The next reaper to die, takes his place. So, when Castiel stabbed me in the back, turns out I got a promotion. New job. New gear.
– Billie, 13.05 Advanced Thanatology
Billie is a reaper who was collecting souls in Superior, Nebraska, after the Darkness was released. After the death of Death, Billie made it her mission to ensure that the next time Sam and Dean Winchester die, they remain dead, threatening to take their souls to the Empty to ensure it. After getting killed by Castiel, she is reincarnated as the new Death and she gains more understanding of the importance of the Winchesters' roles and their survival.
As Sam is researching possible ways to cure the sickness that came with the Darkness, the song "O Death" begins reverberating through the hospital halls. When he goes to investigate he finds a woman singing the song while crouched over a dead body. Sam surmises she is a reaper, and asks her name but she is not forthcoming. Sam apologizes for his hand in killing Death. Billie tells him she is sorry too, but that people are still dying and souls need collecting. She says that she is "here" to deliver a message to Sam: All the times Sam and Dean have come back to life ends now, and the next time they die, they won't be going to Heaven or Hell -- whichever reaper comes to collect their souls will throw them into the Empty, a place that nothing can come back from. She tells Sam she can feel that he is dying and that he is "unclean in the biblical sense;" she then departs, telling Sam she will be seeing him real soon, revealing her name to him before disappearing.
When Dean finds out Sam is in Hell with Lucifer, Crowley sends him to Kenesaw, Nebraska, where in a derelict-looking building he finds Billie standing behind the door. Billie demands the password from Dean and after some protest, he acquiesces to her demand and sings "Camptown Races." Dean initially assumes Billie to be a demon, but is corrected by her. She tells him she is working with Crowley and not for him, citing that with the state of things currently, it's a good idea to have the King of Hell owe you a favor. She hands Dean a large wooden box and walks over to a pair of doors with sigils painted over them. She touches them, causing them to glow, and then opens them to reveal a stairway to Hell. As Dean begins walking down, Billie stays behind and closes the doors.
Sometime later, Billie is sitting around reading a comic book when Castiel suddenly appears before her. She nonchalantly greets him and gives him access to Hell.
Believing Sam to be dead and desperate to bring him back to life, Dean overdoses on a handful of pills in order to get a face to face with Billie. Once he is out of his body, Billie emerges from a white light and freezes the room, telling Dean she is savoring his death. Billie quickly realizes that Dean is too much of a martyr to commit suicide, and asks him what he wants from her. He tells her he needs Sam back. Billie looks at Dean confused, but Dean continues to attempt to make a deal which Billie coldly passes on. Dean appeals to Billie by telling her the Darkness is still free, and Sam can stop her, otherwise once she gets started the world will burn, destroying everything and everyone including Billie. When Billie questions Dean how Sam can stop the Darkness, Dean can't answer. Billie applauds Dean for pretending to want to save Sam for the "greater good," but sees right through Dean and knows he's doing it for himself, because he can't lose his brother. Billie tells Dean that even if Sam could stop the Darkness, the answer would still be "no," as the Winchesters have lost all their second chances. When Dean attempts to trade his life for Sam's, Billie once again refuses, telling Dean she is here to reap him, not bargain, and remarking on the irony that Sam is not dead, but Dean soon will be. Billie extends her hand and tells Dean his time is up and that the Empty is waiting for him. As Dean stares blankly at Billie, Dr. Kessler injects a syringe of adrenaline into his heart to revive him, prompting a dismayed Billie to walk out of the room and into the white light from whence she came.
After Sam and Dean collect the ghosts that have resided at Waverly Hills Sanatorium, Billie appears, watching the Winchesters walk away. Later when Sam and Dean return to the Bunker, the security system seemingly shuts down as Billie makes her entrance. She tells Sam and Dean she saw them at Waverly Hills and questions why, with the world coming to an end, they would be out "busting ghosts." They tell of their plan to collect souls for a bomb to kill the Darkness. Billie simply replies with an "okay" and offers to help them. With the crystal in her hand, souls begin whooshing into the Bunker to it in increasing volume. When asked how many she collected, Billie tells them a couple hundred thousand, having raided the souls stuck in the Veil.
Billie appears outside of the house of dead hunter Asa Fox and tells Dean that something is killing hunters inside and she has already reaped a soul within. Billie is amused by Dean's efforts to get in and agrees to get him inside in exchange for him owing her one. Billie is able to throw Dean through the warded door and into the house. The next morning, Billie appears and tells Dean he owes her one: Mary Winchester. Billie tells them she's a believer that what's dead should stay dead and states that she can tell that Mary doesn't want to be alive and offers her mercy by taking her to Heaven. After Billie confirms that she can't kill Mary due to the rules, Mary declines. Billie tells the Winchesters that if any of them ever change their mind they should call her and then she disappears.
A desperate Dean calls Billie for help for escaping from Site 94. Billie makes a deal bound in blood with the Winchesters where she will kill them for a time and then bring them back to give them a chance to escape. In return, one Winchester must die for good at midnight. At midnight, Billie appears in the road, stops Mary's car, explains the deal, and demands the Winchesters keep up their end. Mary offers herself up in her sons' place and goes to take her own life, but before she can, Castiel stabs Billie from behind with an angel blade, killing her and stating that the world can't afford to lose any of the Winchesters.
After Dean has Sam temporarily induce death on him, his reaper Jessica realizes who he is and reports that Dean Winchester is in the Veil. When Sam's attempt to revive Dean fails, Dean is surprised by the sight of Billie, who reveals that after Castiel killed her, she became the new Death, explaining that when Death dies, the first reaper to be killed after him will take up his mantle. Telling Dean they need to talk, Billie teleports herself and Dean to a place she refers to as her "reading room." She tells Dean that she has heard that he and Sam have been jumping universes and questions him how that is possible. Dean tells her that as Death she should know, but Billie replies that this information eludes her, much to her annoyance. Realizing Dean has the upper hand, he strikes a deal: in exchange for the information, Billie must release the souls trapped in Meadows' home. Billie agrees to the terms and has Jessica usher the souls out of the Veil. Curious as to why he didn't ask her to revive him, Dean tells her he figured it was a moot point and was prepared to die. Billie tells him he has changed and no longer has the same bravado of a man that has died multiple times. Dean explains that after his recent failings, he is prepared to die if it is his time. Billie, however, shows Dean a shelf with notebooks dedicated to him, and the various ways that he may die based on his choices in life. she tells Dean that now is not his time, and that with her taking on the mantle of Death, she sees the big picture, and much to her chagrin, she finds that he and Sam are important and that they have work to do and that's all he needs to know. When Dean attempts to ask her about Mary, Billie sends him away, resurrecting him.
After sending Dean away, Billie begins reading from one of the many notebooks on Dean's shelf.
After Rowena attempts to change her fate and summon Death by killing Sam Winchester, Billie appears. She warns that Rowena is upsetting the natural order. Rowena replies that she will stop if Billie brings Crowley back to life. Billie denies her request, and when Rowena threatens to kill Sam, Billie encourages her, telling Rowena she doesn't do blackmail, despite knowing that killing Sam would cause unforeseen consequences to the natural order. When Rowena fails to kill Sam, Billie attempts to comfort her by telling her "some things just are... and everyone has to live with that." She tells Dean she will see him soon and departs with Jessica.
In a desperate attempt to escape Michael's Monsters, Sam calls upon the Reaper Jessica whom Billie had following the Winchesters around. However, the Reaper Violet appears instead and reveals that Billie now has Reapers following them around in shifts. Sam attempts to convince Violet to teleport the group to safety, but she refuses due to Billie's rules. Despite this, Sam, Castiel, Jack, and Michael are suddenly teleported to the Bunker.
Later, as Dean recuperates in his room, Billie appears to him. Having heard the story of the others' inexplicable escape, Dean realizes that it was in fact Billie who was responsible, despite it being against the rules. Billie admits to rescuing Sam and the others, stating that she "took a calculated risk" and asks Dean not to tell anyone. Billie chides Dean for ignoring her warnings about crossing universes; Dean replies that it was worth it to rescue Jack and their mother. Billie reminds Dean of his visit to Death's Reading Room and all of the notebooks showing the various ways he could die. Billie warns Dean that all of those notebooks have now changed: all but one fate has Michael escaping his prison in Dean's mind and using Dean's body to destroy the world. Billie hands Dean the notebook containing the one fate where Michael loses, shocking Dean at what it reveals must be done. Billie tells Dean that it's up to him to decide what he will do with the information and departs, leaving Dean with the notebook.
Dean reveals to Sam that Billie told him that the only way to stop Michael is the Ma'lak Box. Because no one knows how to create one, Billie provides Dean with the instructions he needed.